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Triple integrals in cylindrical and spherical coordinates

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MATH 209—<br />

Calculus,<br />

III<br />

Volker Runde<br />

<strong>Triple</strong><br />

<strong><strong>in</strong>tegrals</strong> <strong>in</strong><br />

cyl<strong>in</strong>drical<br />

coord<strong>in</strong>ates<br />

<strong>Triple</strong><br />

<strong><strong>in</strong>tegrals</strong> <strong>in</strong><br />

<strong>spherical</strong><br />

coord<strong>in</strong>ates<br />

Integration <strong>in</strong> <strong>spherical</strong> coord<strong>in</strong>ates, II<br />

As <strong>in</strong> rectangular coord<strong>in</strong>ates. . .<br />

Divide E <strong>in</strong>to small <strong>spherical</strong> wedges Ej,k,ℓ, <strong>and</strong> pick a support<br />

po<strong>in</strong>t (x ∗ j,k,ℓ , y ∗<br />

j,k,ℓ , z∗ j,k,ℓ ) ∈ Ej,k,ℓ.<br />

Then:<br />

���<br />

f (x, y, z) dV<br />

with<br />

E<br />

= lim<br />

n,m,ν→∞<br />

n�<br />

m�<br />

ν�<br />

j=1 k=1 ℓ=1<br />

∆Vj,k,ℓ = volume of Ej,k,ℓ.<br />

f (x ∗ ∗<br />

j,k,ℓ , yj,k,ℓ , z∗ j,k,ℓ )∆Vj,k,ℓ

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